30 University of Michigan 



See under Arima. Collected March 6, 8 and lO, 1912. 



At Arima and at the stations east of there where we col- 

 lected there is but one species, Hetaerina caja. 



16, Cunapo River, near Sangre Grande, Trinidad. A slow- 

 flowing stream, eight to ten feet wide, with clay bottom. A 

 tributary of the Oropuche River, flowing to the east, and 

 opposite the westward-flowing Caroni. Collected here Feb- 

 ruary 27, 1912. 



Hetaerina caja was abundant on this stream, and asso- 

 ciated with it we found a single female of macropus. 



ly. Diego Martin River, Trinidad. A stream at the end 

 of the Four Roads electric car line from Port-of-Spain. A 

 fine stream which we collected from Blue Basin to the car 

 line. Collected February 29 and March 3, 7 and 10, 1912. 



Most of our collecting on the Diego Martin was within a 

 mile of the car line, where we found only Hetaerina caja. On 

 March 3 we went to Blue Basin and collected down-stream 

 to the car line, and it was on the upper part of the stream, 

 and there only, that we found macropus. 



18. Don Jaca, Colombia. A clear, rocky stream about 10 

 to 15 feet wide, widely exposed to the sun, on the railroad 

 about 25 kilometers from Santa Marta. Elevation probably 

 about 50 feet. Between kilometers 17 and 18 is a small stream 

 in sand. Collected these two streams December 17, 1916. 



Odonate life was not abundant on either of these streams. 

 On l)oth the only Hetaerina collected was caja. 



19. El Banco, on the Magdalena and Cesar rivers about 

 86 leagues above Barranquilla, Colombia. At the season we 

 were there there was no flowing water near town except the 

 rivers. Along the isolated pools of a wet weather stream in a 

 forest strip surrounded by a dry, treeless plain we found a 

 few species of dragonflies, some in large numbers, but Hetae- 



